SILVER MAPLES WWTP
NPDES ID: NC0047091
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 4 effluent violations.
Violations
May 31, 2026
BOD, 5-day, 20 deg. C
4% over limit
Discharged 13.5 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
8% over limit
Discharged 21 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
BOD, 5-day, 20 deg. C
62% over limit
Discharged 21.08 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
54% over limit
Discharged 30 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, 5-day, 20 deg. C
59% over limit
Discharged 31 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
49% over limit
Discharged 19.325 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, 5-day, 20 deg. C
57% over limit
Discharged 20.45 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
131% over limit
Discharged 45 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, 5-day, 20 deg. C
45% over limit
Discharged 18.8 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
13% over limit
Discharged 22 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, 5-day, 20 deg. C
118% over limit
Discharged 28.4 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
203% over limit
Discharged 59 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
BOD, 5-day, 20 deg. C
8% over limit
Discharged 21 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Flow, in conduit or thru treatment plant
54% over limit
Discharged 0.0614 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
4% over limit
Discharged 13.475 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
13% over limit
Discharged 22 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
158% over limit
Discharged 1030 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
38% over limit
Discharged 27 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
19% over limit
Discharged 15.525 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Coliform, fecal MF, MFC broth, 44.5 C
140% over limit
Discharged 960 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, 5-day, 20 deg. C
38% over limit
Discharged 27 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
50% over limit
Discharged 600 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
12% over limit
Discharged 14.55 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Flow, in conduit or thru treatment plant
19% over limit
Discharged 0.0476 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
32% over limit
Discharged 17.175 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
74% over limit
Discharged 34 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
38% over limit
Discharged 550 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
165% over limit
Discharged 1060 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
33% over limit
Discharged 26 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
3% over limit
Discharged 13.325 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.028 mg/L (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
133% over limit
Discharged 930 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
133% over limit
Discharged 930 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.3 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 3.5 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 64.7494 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
33% over limit
Discharged 26 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
33% over limit
Discharged 26 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.85 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
19% over limit
Discharged 15.425 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
19% over limit
Discharged 15.425 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Temperature, water deg. centigrade
0% over limit
Discharged 19 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
7% over limit
Discharged 48 mg/L against a permitted limit of 45 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
7% over limit
Discharged 48 mg/L against a permitted limit of 45 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 18.3 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0337 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Overdue
October 31, 2024
Solids, total suspended
0% over limit
Discharged 3.9 mg/L against a permitted limit of 45 mg/L (DAILY MX)
DMR, Limited - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 25 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
0% over limit
Discharged 13.7009 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 3.4 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.028 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0363 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.7 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
43% over limit
Discharged 570 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal MF, MFC broth, 44.5 C
43% over limit
Discharged 570 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
0% over limit
Discharged 6.8 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 3.9 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 1.82 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.1 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
September 30, 2024
Chlorine, total residual
4543% over limit
Discharged 1.30000006 mg/L against a permitted limit of 0.028 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
97% over limit
Discharged 0.0788 MGD against a permitted limit of 0.04 MGD (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Coliform, fecal MF, MFC broth, 44.5 C
225% over limit
Discharged 1300 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
5% over limit
Discharged 31.5 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
162% over limit
Discharged 51 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
154% over limit
Discharged 33 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
7400% over limit
Discharged 2.1000001 mg/L against a permitted limit of 0.028 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
BOD, 5-day, 20 deg. C
146% over limit
Discharged 48 mg/L against a permitted limit of 19.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
48% over limit
Discharged 44.26 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
74% over limit
Discharged 22.64 mg/L against a permitted limit of 13 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
19186% over limit
Discharged 5.40000026 mg/L against a permitted limit of 0.028 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal MF, MFC broth, 44.5 C
255% over limit
Discharged 1420 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
162% over limit
Discharged 118 mg/L against a permitted limit of 45 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)